Shear-blade sharpener



May 31, 1932. J CARTER 1,860,404

SHEAR BLADE SHARPENER Filed Nov. 27, 1930 5 Sheets-Sheet l H" is 3\ o I Q q/ fl N L) Bummer y 1932- J. w CARTER 1,860,404

SHEAR BLADE SHARPENER Filed Nov. 27, 1950 3 Sheets-Sheet 2 3 nventor Car" at} JV .79 fidnomeg May 31, 1932. CARTER 1,860,404

SHEAR BLADE SHARPENER Fi led Nov. 27, 1950 s Sheets-Sheet a 3 "mentor C8 rfer. #444") A: W Gttornei;

Patented May 31, 1932 1 T'E'SY-E Jenn w. CARTER, or

UNITED g SHEAR-BLADE PATENT 0 QMAELA, nniaimsxn.

snianrnnim 1 Application filed November 27, 1930. Serial No. 498,517.

adequately. supporting blades of small.

scissors as well as large shears. Also it is an objeotof the invention toprovide a sharpening, device embodying the above named ieatures which may be conveniently manufactured and produced at a limited expensei With the above objects in v'iew'and others to benaentioned, the invention presents a new and usefnl' constrnction, combination I 'andarrangement otp'arts as described herein and claimed, and as illustrated in the accom:

panying drawings it being understood that 0 es maybe made inform, size, propor tion of parts and minor details, said changes beingwith'm the. scope of the invention. as claimed... In the drawings, Fig.1 is a side View of a shear-blade sharpener embodying my invention- Fig.12 is a plan. View, of a combined Fig. 3 is a plan View of a base for support ing the operating parts of the device. Fig. 4

is aside view of the outer Fig. '5 is a,

side View of the base. Fig. 6 is" a side view of the inner aw. Tis a side: view of one of theset screws employed. Fig. 8 is aside, view ofa spring. Fig; 9 is aside View of a cam. F ig. IOshows. a side. view of a slotted cylinder and its clamping-screw.

Fig. 11 is'a-side view showing :the outer jaw 'mounted on the cylinder, at shear-blade; brokenaway, also being shown clamped position between the: outer and inner jaws. Fig; 12 anv end View of, the. outer jaw mounted on the, cylinder, and asst-screw engaging in the slot of the cylinder, said'cylinderand a part; ofthe .jaw being in section. Fig. 123 is'a brokemsectional view showing a part of. the base and a guide. I

a milledsuriiaee forconvenience in use.

Referring now to .the drawings for a more,

particular description, I. provide :a baseld v preferahlyof triangular form provided with a pair o-fstandards- 15 to provide bearings for the ends a of a cylinder 16,; said cylinder when mounted in the standards being adapted to be rotated subject to the control of a fingernut 17. (Fig. 10.) which may; be rotated on the threaded part of onset tlieend portions 0; of. cylinder, it will be understood that the nut 17 when rotated in one direction may be pressed against a standard 14 with such force that any rotatable movement of the cylinder .Wl'l'ibQ prevented. 'The nut'l't is provided. with ahead of disc-form having It willbe seen that the cylinder maybe partly rotated and may then the maintained in afixed position relative to the base. I

The outer jaw 18 is; provided with a sleeve 1) for a mounting on the cylinder and this jaw is adapted to have'a slidable movement on the cylinder so that it may be adjusted longitudinally thereof. The cylinder is provided with a slot 19 and by Ineans'oii a set-screw 20 which is threaded in the sleeve 6 said outer jaw may be. adjusted longitudinally ofthe cylinder; and by means of this set-screw 20 any, rotatable movement of said outer, jaw on. the cylin-dernfiay be prevented; and by providing the slot 19 and this set-screw the outer .jaw 18 may be conveniently adjusted.

' The. inner jaw 21 .isprovided with a pair or" hinge-members c (Fig. '6) which cooperatefwith ahinge-member d of the outer jaw 18 to form ahinge-joint to permit the inner jaw toswi-ng, so that its edge maybe pressed toward the outer jaw for firmly holding; an object therebetween, as; the 'blade 22 shown in Fi '11 of the drawins suitable .o oenines 2: to 7 1 c:

being provided in the-hinge-members c and (Z torreceivinga pin (not shown)- being used for this; hlBg'BHjiQlLI It.

The inner is; ot such proportion that its, upper edge will be disposed: somewhat below the upper-edge of the enter jaw as best shownin Fig. l oi thedrawings, and by use: of a screw 23 and finger-nut 2d the edge of the inner jaw may be pressed toward the edge; of the-outer jaw; said screw being threaded in the outer jaw, and the screw being provided with a head 25 adapted to engage the outer side of said inner jaw.

Numeral 26 indicates a spring which is carried by the screw 23 and is disposed between the jaws and which operates, normally, to separate the jaws.

The combined stone and file holder is indicated generally at 27. It preferably consists of an elongated loop 28 provided at one end with a head-piece 29 and a foot-piece 30. A handle 31 is threaded in the head-piece and a spindle 32 is threaded in the foot-piece. Numeral 33 indicates an elongated stone preferabl rectangular in cross-section which may e disposed in the loop and may be secured therein by rotating the handle, a contact-block 34 best shown inFig. 2 being provided and interposed between the end of the stone andend of the screw 35 of the handle.

Numeral 36 indicates a file which is disposed at the side of the stone, said file being secured in the loop by rotating the handle in one direction, the block 34: being provided with a lip 37 as an aid in holding one end of the file.

Numeral 38 indicates an upright guide which projects above one end of the base 14, said guide being provided with an aperture 39 for receiving the spindle 32, the guide at the edges of the aperture 39 being chamfered or reamed to permit a free movement of the spindle therein when said element 27 is reciprocated. I

In operation, it will be understood that the element 27 is moved forwardly and rearwardly, the spindle moving through the aperture of the guide 38, the stone or file bearing upon the ed e of the blade to be sharpened and said blade eing firmly held between the jaws 18 and 21, the edge ofthe blade'being disposed horizontally and somewhat above the edges of the jaws.

In order that the blade may be disposed at a suitable angle to the stone or file during operation, and that the angle may be obtuse or acute, as may be required, the herein described invention operates to great advantage. It will be seen that if the jaws are disposed at approximately a right-angle to the base the angle will be obtuse for filing or sharpening the blade; and it the jaws have been swung rearwardly the angle may be acute.

According to the construction as disclosed, the jaws, after the finger-nut 17 has been rotated in one direction may be readily swung rearwardly a suitable distance so that the jaws and blade will be disposed at an acute angle to the stone 33 or file 36, and after a suitable adjustment has been made the finger-nut 17 may be rotated in a reverse direction for preventing any swinging movement of the jaws.

It has been stated that the jaws may be adthe file or stone with the blade will be at right-angles to said blade. Also when sharpening short blades or the blades of scissors the may be adjusted so that these blades will be disposed above the central part of the base.

Numerals 40 indicate a pair of cams each having a threaded stem all best shown in Fig. 9, and provided with a finger-nut 42. The outer jaw is provided with anaperture 43 and a slot 44 for receiving the stems 41. of the cams, and since the cams are mounted eccentrically they may be adjusted for supporting the blades higher above the edges of the outer blade than ordinary, this being of great advantage when sharpening the blades of scissors, and when sharpening large blades they may be disposed lower than ordinary.

It will be understood that, on account of the provision of the slot 4! one of the cams may be adjusted in the outer-jaw for supporting long or short blades as may be re.- quired. I

It will be understood that the particular form shown for the aperture 39 is to permit a free movement of the spindle when the latter is disposed at various angles to the guide 38. Also it will be understood that the screw 23 is threaded in the aperture 45 (Fig. 4) and traverses the aperture 46 of the inner jaw (Fig. 6), also that the set screw 20 is thread ed in the aperture 47 (Fig. 4).

It will be appreciated that the tool or apparatus as described provides all necessary adjustments needed for holding shears or scissors of all ordinary sizes in proper position ready for sharpening and that the several adjustments mentioned may be made readily and conveniently.

I claim asmy invention,

-1. In devices for the purpose described, a

base provided with a guide, a cylinder rotatably mounted on the base and havin a slot formed longitudinally therein, an element threaded on the cylinder for controllingv the rotatable movements thereof, a jaw mounted to permit adjustments longitudinally of the cylinder and having a set screw engaging in said slot, a second jaw pivotally mounted on andarranged to be pressedtoward the first named jaw, and an elongated sharpening ele- .ment for longitudinal reciprocation having a part engaging said guide.

' 2. In devices for the purpose described, a base provided with an apertured guide, an elongated sharpening element arranged for longitudinal reciprocation and having a part disposed in the aperture of the guide, a cyl I cinder mounted to permit rotatable movements of the base, an element threaded on the cylinder for controlling the rotatable movements thereof, a aw mounted to permit adjustments thereof longitudinally ofthe. cylinder and having a setscrew engagingthe cylinder, a second jaw, a screw traversing said jaws, a wing-nut movable on the screw for pressing the second ,jaw toward the first named jaw, and a spring between said jaws for resistlng a pressure of the second jaw toward its said first named jaw.

3. Infdevices for the purpose described, a

I base provided with aguide, a sharpening element arranged to be reciprocated and having a part disposed in said guide, a journalled cylinder on the base, means on the cylinder for maintaining it stationary with the base, a jaw provided with a slot and arranged to be adjusted longitudinally of the cylinder, a

, pivotally mounted second jaw carried on the first named jaw, devices mounted on said jaws for pressing the second jaw toward the first named jaw, and a pair of eccentrically mounted cams between the jaws, one of said cams being arranged for adjustments longitudinally of said slot.

Intestimony whereof, I afiix my signature.

JOHN W. CARTER. 

